This European Standard specifies the constructional and performance requirements and methods of test for indirectly heated, unvented (closed) storage water heaters of up to 2 000 l volume suitable for connection to a water supply at a pressure between 0,05 MPa and 1,0 MPa (0,5 bar and 10 bar), and fitted with control and safety devices designed to prevent the temperature of the stored drinking water from reaching 95 \u00b0C. Whilst storage water heaters intended primarily for direct heating are not covered by this standard, it does allow the provision of electric heating elements for auxiliary use.<\/p>\n
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| 44<\/td>\n | Contents Page <\/td>\n<\/tr>\n | ||||||
| 46<\/td>\n | European foreword <\/td>\n<\/tr>\n | ||||||
| 47<\/td>\n | Introduction <\/td>\n<\/tr>\n | ||||||
| 48<\/td>\n | 1 Scope 2 Normative references 3 Terms, definitions and symbols <\/td>\n<\/tr>\n | ||||||
| 49<\/td>\n | 3.1 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 50<\/td>\n | 3.2 Symbols 4 Requirements 4.1 Constructional requirements 4.1.1 Inspection access 4.1.2 Draining 4.1.3 Hydraulic connections 4.2 Temperature control <\/td>\n<\/tr>\n | ||||||
| 51<\/td>\n | 4.3 Mechanical resistance and stability 4.3.1 Pressure resistance of water storage vessel 4.3.2 Pressure resistance of primary heater 4.3.3 Durability 4.3.3.1 General 4.3.3.2 Water heaters without inlet pressure and system expansion control 4.3.3.3 Water heaters designed for use with expansion vessels or internal expansion space <\/td>\n<\/tr>\n | ||||||
| 52<\/td>\n | Figure 1 \u2014 Diagram of test pressure cycle variations Figure 2 \u2014 Pressure control options <\/td>\n<\/tr>\n | ||||||
| 53<\/td>\n | 4.3.4 Leakage test on double-walled primary heater 4.4 Safety equipment 4.4.1 General 4.4.2 Energy cut-out device 4.4.3 Temperature relief valve 4.4.4 Pressure relief\/expansion valve 4.4.5 Pressure reducing valve <\/td>\n<\/tr>\n | ||||||
| 54<\/td>\n | 4.4.6 Provision for expansion 4.4.7 Backflow prevention 5 Marking 6 Evaluation of conformity 6.1 General 6.1.1 Compliance testing <\/td>\n<\/tr>\n | ||||||
| 55<\/td>\n | 6.1.2 Market surveillance 6.2 Initial type testing 6.2.1 General 6.2.2 Actual volume 6.2.3 Rated storage volume Table 1 \u2014 Tolerance on storage volume 6.2.4 Hot water volume <\/td>\n<\/tr>\n | ||||||
| 56<\/td>\n | 6.2.5 Primary heating power (heat exchanger performance) 6.2.6 Durability testing 6.2.7 Double-walled primary heaters 6.2.8 Standing heat loss 6.2.9 Pressure resistance 6.2.10 Temperature control devices 6.2.11 Heat exchanger pressure drop 6.3 Production testing <\/td>\n<\/tr>\n | ||||||
| 57<\/td>\n | 6.4 Factory production control (FPC) 7 Technical documents 7.1 General 7.2 Assembly and maintenance instructions <\/td>\n<\/tr>\n | ||||||
| 58<\/td>\n | 7.3 Operating instructions <\/td>\n<\/tr>\n | ||||||
| 59<\/td>\n | Annex A (normative) Hot water safety and performance testing A.1 Tests required Table A.1 \u2014 Performance testing requirements A.2 Test apparatus and tolerances A.2.1 General <\/td>\n<\/tr>\n | ||||||
| 60<\/td>\n | Figure A.1 \u2014 Apparatus A.2.2 Description of components <\/td>\n<\/tr>\n | ||||||
| 61<\/td>\n | A.3 Performance tests A.3.1 Hot water performance <\/td>\n<\/tr>\n | ||||||
| 62<\/td>\n | Table A.2 \u2014 Domestic hot water flow rate A.3.2 Primary heater pressure drop <\/td>\n<\/tr>\n | ||||||
| 63<\/td>\n | A.4 Interpretation and calculation of hot water performance results A.4.1 Hot water capacity calculations A.4.2 Calculation of Reheat performance A.4.3 Calculation of V40 (equivalent volume of \u201cmixed\u201d water available at 40 C) <\/td>\n<\/tr>\n | ||||||
| 64<\/td>\n | A.5 Function of safety devices <\/td>\n<\/tr>\n | ||||||
| 65<\/td>\n | Annex B (normative) Measurement of standing heat loss for factory insulated storage water heaters B.1 General Table B.1 \u2014 Thickness of insulation according to size of pipe or connection B.2 Apparatus <\/td>\n<\/tr>\n | ||||||
| 66<\/td>\n | Figure B.1 \u2014 Standing Heat Loss Test Apparatus <\/td>\n<\/tr>\n | ||||||
| 67<\/td>\n | B.3 Test Procedure <\/td>\n<\/tr>\n | ||||||
| 68<\/td>\n | Figure B.2 \u2014 Temperature regime (first three cycles) B.4 Calculation of Results <\/td>\n<\/tr>\n | ||||||
| 70<\/td>\n | Annex C (informative) Inspection access Table C.1 \u2014 Openings for inspection and cleaning (including effective heating surfaces) <\/td>\n<\/tr>\n | ||||||
| 71<\/td>\n | Table C.2 \u2014 Openings for cleaning and inspection <\/td>\n<\/tr>\n | ||||||
| 72<\/td>\n | Annex ZA (informative) Relationship between this European Standard and the requirements of Commission Delegated Regulation (EU) No 812\/2013 of 18 February 2013 supplementing Directive 2010\/30\/EU regarding energy labelling for water heaters and hot w… Table ZA.1 \u2014 Correspondence between this European Standard and Commission Delegated Regulation (EU) No 812\/2013 <\/td>\n<\/tr>\n | ||||||
| 73<\/td>\n | Annex ZB (informative) Relationship between this European Standard and the requirements of Commission Regulation (EU) No 814\/2013 of 2 August 2013 implementing Directive 2009\/125\/EC with regard to Ecodesign requirements for water heaters and hot wat… Table ZB.1 \u2014 Correspondence between this European Standard and Commission Regulation (EU) No 814\/2013 <\/td>\n<\/tr>\n | ||||||
| 74<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Tracked Changes. Water supply. Specification for indirectly heated unvented (closed) storage water heaters<\/b><\/p>\n |